Purchased this to help clean up old and newer pet stains and worked in dirt. On a septic system so wanted to check the chemical SDS to see if it would be harmful. Sure enough it isn't a good idea to dump the waste down the drain (was expecting that). However what really caught my eye was that it clearly says on the safety sheets that its toxicilogy and lethality are TESTED ON ANIMALS! RATS, RABBITS, AND WHO KNOWS WHAT ELSE!! If I knew these things involved animal cruelty i wouldn't have purchased it. Especially considering it says that no other products can be used with the machine.